Brake mechanism for car-trucks.



Eatented Jan. 25, 1916.

441m WSO@ I. A. BROOKS.

BRAKE MECHANISM FOR CAR TRUCKS.

APPLICATION FILED FEB. 27, I9l3.

mc coLuMulA PLANDGRAPII C0.. WASHINGTON. D, c.

@ldlhlltg JABIES A. BPAGGKS, GF PEILADELPH., PENNSYLVNA, ASSIGNQR TO THE J. G. BRILL C0., OF PHILABELPEIA, EhlNSYL/TAN'IA, A CORPORATION OF FENNSYLVANIA.

Specification of Letters Patent.

Patented dan. 25, 19316.

ivided and this application tiled February 27,

ll. Serial No. 750,989.

cn the city on aas relation to improvewake. mechanism for use on car trucks, especia ,y electrically propelled .ruclrs, shown in my Patent, llo. 1,071,694, dated Ideptember 2, 191, orp wnich this application is a division; and it consists in the combination of elements and their equivalents as hereinafter described and claimed.

Referring to the drawings appended hereto: Figure l is a side elevation of a portion of a car trucl-, artly in section, showing the essential portions of my improved brake mechanism. Fig. 9. is an enlarged sectional elevation of the spring bearing block showing the connection et the release spring and the connecting rod thereto; and Fig. 3 is a like View of a inodilication of the connection.

rlhe improvements herein described relate 4more particularly to what are known as inside-hung brake slices. Any conventionally or otherwise desirably constructed truck may be used.

At l are shown the wheels, 2 are the brake slices, each shoe being provided with a head or carrier 3, having a bifurcated lug or projection il, the extreme ends of which carry pins 5.

At 6 are the truck gusset plates. Underneath the gusset plates are bloclrs 'l' to which are secured paired links or hangers 8, the lower ends oiC which pivotally engage bolts 9 passing through the b re heads 3.

Act l0 is the live lever, the upper end of which is secured to a brake rod ll leading to the source or" power and which passes through the bifurcated extension l of the brake head, its lower end 12 projecting below the same. rlllie live lever is pivoted to the brake head by the bolt 18.

At lll is the dead lever..

At l5 is an upwardly -extending curved bracket secured to the gusset plates or transoms.

At 1G are paired links pivotally secured to the braclrst by a bolt l?. The outer ends of these 1V'nlrs carry a bolt 18 to which is secured the upper end or" the dead lever, which latter passes through the bifurcated eXtension l of the brake head, it being pivoted or ulcrumed to the bralre head at 19. Both live and dead levers pass Vthrough slots in the gusset plates. nEhe lower ends l2 and 2O of the live and dead levers are secured together by the turnbuelrle 2l, comprising the sections 9.2, pivotally secured by bolts 28 and 24 to the lower ends ot' said levers, the sections being united by a bar 25 oppositely threaded into the sections 22. J am nuts 26 nay be used to maintain adjustment in the usual way.

The above arrangement organizes the brake apparatus into a convenient and accessible whole.

The usual release spring is dispensed with, and in its place l substitute a release spring extending between the brake heads or carriers so that the pull of the release spring will be almost direct and very positive. The release spring comprises bolts 27 pivoted to the bolts 5 secured to the extensions 4L of the brake heads, the threaded ends 2S oi' the bolts, engaging threaded apertures formed in spring heads or carriers 29, the outer surfaces ot' which are cast or so formed as to talre the turns of a spiral spring 30, which frequently engages said carriers. Shortening or elongation of this spring device may be had by turning the spring 30 or heads 29 in the appropriate direction. rll`he connection of the bolts with the spring carriers may be modified, as in Fig. 3, by causing the threaded ends 2S to pass through enlarged holes 3l in the carriers which form a recess for the reception of a nut 32 movable on the ends of the bolts, by means of which the desired adjustment can be had.

lt is apparent that my various improvements can be embodied in structures specilioally different from those herein disclosed without departing from the spirit of my invention.

'W hat l claim is:

ln a` brake mechanism, the combination with oppostely disposed brake shoes, of

hangers pivotally connected at their lower ends to the brake heads, a live lever, the upper end of which is connected to a brake rod, the lower end connected to and projecting through a brake head and extending below the saine, a dead lever pivotally connested with the other brake head and eX- tending below the saine, 1paired links from which the dead lever is supported, eXtensions on the brake heads, a coil spring eX- tending between said extensions and a turn 'this 19th day of February, 1913.

JAMES A. BROOKS.

Witnesses:

HENRY C. ESLING, H. F. MCKJLLIP.

Copies of this patent may be obtained for ve cents each, by addressing the Gommissioner of Patents,

Washington, D. C. 

